Display panel and display device

Patent metadata

Field	Value
Publication number	US-12089472-B2
Application number	US-202318317798-A
Country	US
Kind code	B2
Filing date	May 15, 2023
Priority date	Apr 9, 2020
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Disclosed are a display panel and a display device, the display panel including: a substrate including a display area, a peripheral area and a welding area; at least one barrier in the peripheral area and surrounding the display area, the barrier including a single-sided barrier structure between the display area and the welding area; an organic insulating structure including sub-insulating structures, each sub-insulating structure having a first boundary located between the display area and the single-sided barrier structure, for any two adjacent sub-insulating structures, the first boundary of the sub-insulating structure on a side away from the substrate being closer to the display area than the first boundary of the sub-insulating structure on a side proximal to the substrate; a distance between first boundaries of any two adjacent sub-insulating structures is greater than or equal to 20 μm; a touch electrode pattern; and a touch signal line.

First claim

The invention claimed is:

1. A display panel, comprising:
a substrate, a display area, a peripheral area and a welding area, wherein the peripheral area surrounds the display area, and the welding area is positioned on a side of the peripheral area away from the display area;
at least one barrier disposed on the substrate, the barrier being located in the peripheral area and surrounding the display area, the barrier comprising a single-sided barrier structure located between the display area and the welding area;
an organic insulating structure disposed on the substrate, the organic insulating structure comprising a plurality of sub-insulating structures disposed in a stacked manner, each of the sub-insulating structures having a first boundary located between the display area and the single-sided barrier structure, wherein, for at least two adjacent ones of the sub-insulating structures, the first boundary of the sub-insulating structure on a side away from the substrate is closer to the display area than the first boundary of the sub-insulating structure on a side proximal to the substrate;
a touch electrode pattern arranged on a side of the organic insulating structure away from the substrate;
a touch signal line arranged on a side of the organic insulating structure away from the substrate, a terminal of the touch signal line is electrically coupled to the touch electrode pattern, another terminal of the touch signal line is coupled to the welding area, and an orthographic projection of a portion, in the peripheral area, of the touch signal line on the substrate intersects with the first boundary of each of the sub-insulating structures,
a space exists between the first boundary of each of the sub-insulating structures and the single-sided barrier structure.

2. The display panel according to claim 1 , wherein a distance between first boundaries of at least two adjacent ones of the sub-insulating structures is greater than or equal to 20 μm.

3. The display panel according to claim 2 , wherein the distance between the first boundaries of any adjacent two of the sub-insulating structures is between 25 μm and 60 μm.

4. The display panel according to claim 1 , wherein the sub-insulating structures of the organic insulating structure comprise at least two of:
a first planarization layer disposed on the substrate;
a second planarization layer located on a side of the first planarization layer away from the substrate; or
a pixel defining layer positioned on a side of the second planarization layer away from the substrate.

5. The display panel according to claim 1 , further comprising: an encapsulation layer arranged on a side of the organic insulating structure away from the substrate;
the touch electrode pattern and the touch signal line are both positioned on a side of the encapsulation layer away from the substrate.

6. The display panel according to claim 5 , wherein a recess is formed between the organic insulating structure and the single-sided barrier structure, an orthographic projection of the encapsulation layer on the substrate simultaneously covers an orthographic projection of the organic insulating structure on the substrate, an orthographic projection of the recess on the substrate, and an orthographic projection of the single-sided barrier structure on the substrate, the single-sided barrier structure being between the substrate and the encapsulation layer.

7. The display panel according to claim 5 , further comprising: a touch insulating layer arranged on a side of the encapsulation layer away from the substrate;
the touch electrode pattern comprises a plurality of touch driving electrodes and a plurality of touch sensing electrodes, the touch driving electrodes intersect with the touch sensing electrodes, the touch driving electrodes and the touch sensing electrodes are insulated and spaced from each other by the touch insulating layer at intersection positions between the touch driving electrodes and the touch sensing electrodes, and each of the touch driving electrode and the touch sensing electrode is correspondingly coupled to one touch signal line,
wherein the touch driving electrodes comprise: a plurality of driving electrode elements arranged along a first direction and coupling parts coupled between every two adjacent ones of the driving electrode elements;
the touch sensing electrodes comprise: a plurality of sensing electrode elements arranged along a second direction, and bridge parts coupled between every two adjacent ones of the sensing electrode elements;
the first direction intersects with the second direction, the driving electrode elements, the coupling parts and the sensing electrode elements are located on a side of the touch insulating layer away from the substrate, and located in a single layer, and the bridge parts are located between the touch insulating layer and the encapsulation layer,
wherein the touch signal line comprises a first transmission portion and a second transmission portion, the first transmission portion is located between the touch insulating layer and the encapsulation layer, the second transmission portion is located on a side of the touch insulating layer away from the encapsulation layer, and the second transmission portion is electrically coupled to the first transmission portion through a via hole penetrating through the touch insulating layer.

8. The display panel according to claim 1 , wherein the display area comprises a plurality of pixel units each having a light emitting element disposed therein, and the display panel further comprises a power supply line electrically coupled to the light emitting element, wherein the power supply line is located between the organic insulating structure and the substrate, and an orthographic projection of the power supply line on the substrate overlaps with an orthographic projection of the first boundary on the substrate.

9. The display panel according to claim 4 , further comprising:
a first buffer layer disposed on the substrate;
a semiconductor layer disposed between the first buffer layer and the first planarization layer;
a first gate insulating layer disposed between the semiconductor layer and the first planarization layer;
a first gate electrode layer provided between the first gate insulating layer and the first planarization layer;
a second gate insulating layer provided between the first gate electrode layer and the first planarization layer;
a second gate electrode layer provided between the second gate insulating layer and the first planarization layer;
an interlayer insulating layer provided between the second gate electrode layer and the first planarization layer;
a first source-drain conductive layer arranged between the interlayer insulating layer and the first planarization layer;
a second source-drain conductive layer arranged between the first planarization layer and the second planarization layer;
a first electrode layer disposed between the second planarization layer and the pixel defining layer, the first electrode layer comprising a plurality of first electrodes, the pixel defining layer comprising pixel openings in one-to-one correspondence with the first electrodes;
a light emitting layer disposed in the pixel openings;
a second electrode layer arranged on a side of the light emitting layer away from the substrate;
an encapsulation layer arranged on a side of the light emitting layer away from the substrate;
a second buffer layer arranged on a side of the encapsulation layer away from the substrate,
wherein the touch electrode pattern and the touch signal line are arranged on a side of the second buffer layer away from the substrate.

10. A display device, compri

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Zhang Bo
• Dong Xiangdan
• Wang Rong
• Gou Jie
• Cheng Bo

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title